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# IBKR TWS API

* The TWS API [Event Trading section](/tws-api/doc/event-trading/introduction) has been consolidated and streamlined for improved readability.
* Update to [CME Event Contracts](/tws-api/doc/event-trading/contracts) to reflect 0.01 USD increment of CME contracts.
* Update to our [Avaialble Tick Types](/tws-api/doc/md/streaming-data#available-tick-types) removing ticks 97 and 98 (ETF Nav High/ETF Nav Low).
* Updated detail of tick 99 indicating it is unique for NASDAQ ETFs rather than ETFs generally.